selstate.h

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// $Id: selstate.h 751 2006-03-31 15:43:49Z alex $
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 */

// Declaration of the following classes:
/*
    
        SelectionState 
        SelNdRng
        SelNd
*/ 

// Check in comments
/*
*/         
      
#ifndef INC_SELSTATE
#define INC_SELSTATE

class Node;

/********************************************************************************************

>   class SelNdRng

    Author:     Simon_Maneggio (Xara Group Ltd) <camelotdev@xara.com>
    Created:    12/10/93
    Purpose:    SelNdRng objects are stored in an array within SelectionState objects, they 
                record a range of upto 255 contiguous nodes as being selected.  
    SeeAlso:    SelectionState      

********************************************************************************************/

class SelNdRng : public CC_CLASS_MEMDUMP
{
CC_DECLARE_MEMDUMP(SelNdRng);

public:
    Node* FirstNode;        // First selected node in a contiguous range of selected nodes
    BYTE NumSelected;        // Number of selected nodes including first (Max 255) 
                             // Stored as a byte to minimise space. If there are >  
                             // 255 selected nodes then > 1 SelNdRng should be created.     
};        

/********************************************************************************************

>   class SelectionState

    Author:     Simon_Maneggio (Xara Group Ltd) <camelotdev@xara.com>
    Created:    12/10/93
    Purpose:    Used to record and restore all selections in the Camelot tree. 
                 
    SeeAlso:    -

********************************************************************************************/

class SelectionState : public CC_CLASS_MEMDUMP
{
CC_DECLARE_MEMDUMP(SelectionState);

public:  
    SelectionState(); 
    BOOL Record();                               // Records the current selected state
    void Restore(BOOL RestoreSelBlobs = FALSE, BOOL RemoveBlobs = TRUE); // Restores the recorded selected state   
    ~SelectionState();                           // Deletes lists 
    UINT32 GetSize();                            // For finding the size of the Selection
                                                 // state in bytes
    BOOL operator==(SelectionState& SelState);   // Compares this SelectionState with another to determine
                                                 // if they are the same. 

    SelNdRng* GetSelectionList();              // Diccon 9/99 access functions
    UINT32 GetNumRanges();
    Node** GetNodeList();                       
    UINT32 GetNumNodes();                         
private:    
    // Funcs called from Restore() to ensure every single node in the selected spread is deselected.
    void DeselectAll(BOOL RemoveBlobs = TRUE);
    void DeselectAll(Node* pNode);

    // When Record() is invoked all selected nodes will be recorded on either the SelNdRng 
    // list, or the SelNdLst. If a node is contiguous with other selected nodes then it 
    // will be stored on the SelNdRngList (Therby reducing the amount of storage required for 
    // recording selected nodes). Otherwise the node is stored on the SelNdLst. 
    
    UINT32 NumNdRng;          // The number of SelNdRng items in the SelNdRngList
    UINT32 NumNd;             // The number of Node* items in the SelNdList
    SelNdRng* SelNdRngList;   // An array of node ranges 
    Node** SelNdList;         // An array of pointers to nodes in the selection 
}; 


#endif

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